Locomotive-boiler furnace.



F. F. GAINES.

LOCOMOTIVE BOILER FURNACE.

H APPUCATION mm JULY 2-1 29:3. 1,138,fi1, Rammed May 4, 1.91.

2. SHHLFS SHEET I- UNITED s'rA'rEs PA N, it

FREDERICK F. GAINES, OF SAVANNAH. G-ECR MENTS, TO AMERICAN ARCHCOMZAIJY.

DELAWARE.

LOCOMOTIVE-QQI...

To all whom it may concern Be it known that I, FREDERICK F. Grimes, acitizen of the United States, and a resident of Savannah, in the countyof Chatham and State of Georgia, have invented certain new and usefulImprovements in Locomotive- Boiler Furnaces, of which the following is aspecification.

My invention relates to improvements in locomotive boilers, and hasparticular reference to improvements in fireboxes or fornaees forlocomotive boilers.

The object of my invention is to provide 7 a firebox constructionwhereby the efficiency erative condition an indefinitely longtime.

Further objects of my invention will appear hereinafter.

My invention consists of a locomotive boiler firebox, in combinationwith a refractory cross wall arranged in the forward part thereof, a,bridge member extending across t'h firebox and supportedthereby havingashelf or ledge upon which the Wall rests and is supported, and having anintegrally formed buck stay plate extending upwardly over the forwardface of the wall and to which the wall is secured.

My invention further consists in a firebox having a cross Wall arrangedin its forward part rising from substantially the level of the grate,and a transverse bridge member spanning the firebox and supportedthereby, said bridge member consisting of an integrally formed wallshelf and buck stay plate adapted to hold the wall and to-retain it inposition.

' My invention further consists in a support for cross walls inlocomotive fireboxes, said support having a Wall shelf portion and theline .l integrally cing said sup- .wboz.

or consists in locoiirov ed with a trans a wall 1'! formed. a port in Myi motive be; in fi 11 verso i'ei'rartor: said all n; conduits. aretaining; .3; wall in ,or admitting doing the HPHHYUTS C1211. iii" reared air intrin the several one of parts. isfrr *t" n. by which ed, andicuierly and in the f the above on. all as here pointed 0 1i 1 My inventstood by row; drawiiiigs. twining :i

tion. and in Figure 1. section a cross wail Fig. 2. a with firebox ontilt ll seoiii n. taken end Pig. 7 is a 1 wing another on the View semislight 111:3. my inven on. The f a well reboxes to prevent o flow of thegases of con'ibiistioi': Tl e to fines, thus retaining the in thefirebox a sufiicient time to per! coan'giletion of the combustion thefuel before the gases escape through the lines, and causing the gases tocirculate throughout the firebox, thereby efliciently imparting the heatthereof to the water the boiler.

Cross ordinari y built are expensive to .13 and e" a e ensive maintainfor by reason 0 the extremely high temperature in w. they are ed, andthe severe shaking vihration and jarring to which they are subjected inuse they soon disintegrate and fall to pieces By means of my invention Iam enabled to produce cross walls in fireboxes which retain theadvantageous features above noted and which substantially eliminate thedefects which have appeared to be inherent heretofore in such walls.

A locomotive boiler firebox A, as illustrated in the drawings, consistsof a flue sheet a at the forward end, a rear sheet a a crown sheet a andside sheets a. Flues a lead forward from the flue sheet, and the rearsheet is provided with a fuel door or opening a. The firebox is providedwith a grate a of usual construction. I provide a refractory cross wallB arranged in the forward end of the firebox spaced rearwardly from theflue sheet and forming between the wall and the flue sheet an auxiltactwith the wall-retaining plate lower row of bricks rests directly iarycombustion chamber a*. The wall does not extend to the crown sheet, butconnecting passage (4 is provided between the top of the wall and thecrown sheet through which the gases of combustion. flow from the maincombustion chamber a to the auxiliary combustion chamber a". Forsupporting the wall in position I provide a transversely arranged wallsupport C. This wall support consists of a wall shelf 0' arrangedbeneath the wall and extending from side to side in the firebox, anintegrally formed wall-retaining plate 0 rising from the for- Ward edgeof the shelf in contact with the forward face of the wall, and alsoextend ing substan 'ally from side sheet to side sheet. At t e endsofthe shelf I provide downwardly extending plates or brackets .0 adaptedto be bolted to the side walls of the firebox by means of bolts 0 I alsoprovide a downwardly extending flange 0* joined to the rear Iedge of theshelf, andlextending across the firebox. This flange or plate 0" servesto strengthen the shelf and I extend its lower edge below the lower edgeof the firebomrausing it to serve to direct air into and throughconduits provided in the wall. I further provide the bridge member C-with a depending flange, or plate (i joined to the forward edge of theshelf, and adapted to form part of the floor of the auxiliaryconibustion chamber. For the purpose of strengthening the wall-retainingplate a I provide it with integral vertically extending ribs 5 mergingat their lower ends into the depending wall (it wail of severaltransverse rows b of bricks b arranging them in the fOITx'l of avertical wall, the forward face of which is in con T he upon the shelf 0and for the purpose of retaining this lower or first row in raisition. Ipro vide, upon the rear edge of the shelf, an

I preferably build the upwardly extending llange or ledge c whichcontacts with the rear face of the lower row of bricks and holds it uponthe shelf. I ;-referibiy form the several bricks with ventralprojections 6 upon their upper sur faces and with complementary groovesor openings b on their lower surfaces, whereby the several rows ofbricks are interlocked together. For the purpose of retaining the w allin position against the plate 0 I provide a row of cap bricks Z formedto overlap the upper edge of the wall and provided on their rear edgeswith depending flanges I) adapted to overlap the upper edge of the walland on their front edges with similar depending portions 7) adapted toengage the forward face of the plate 0 These cap bricks thus formedserve to interlock the upper end of the wall with the upper end of theretaining plate and thereby re.- tain the wall in position. thisinterlocking of the cap bricks with the wall and plate, I sometimessecure the bricks of the top row of the wall to the upper part of theplate by means of bolts b". As thus described the wall serves thefunction of preventing a direct flow of the gases of combustion from thefuel bed to the fines and the gases of combustion are thereby retainedin the firebox longer than they would be held therein if they wereallowed to How directly from the fuel bed to the flues. The wall asconstructed and maintained is substantially permanent, being heldagainst disintegration by means of the integrally formed shelf andretaining plate. As a further feature, I provide the wall withvertically extending air conduits or passages b which extend from thelower edge thereof and are adapted to admit air to the firebox from theupper part of the wall through its rear face and beneath the overhangingportion of the cap bricks 7). several of these passages so that theair-, is admitted to the firebox in a plane extending substantiallyacross the box and servin to add air to the of combustion as t'ey risefrom the fuel bed and to thereby effect the substantially perfectoxidation of the fuel. Forthe purpose of admitting air into the conduitsI provide the shelf 0 with air inlet openings 0 one for each conduit andthe depending flange or plate a serves to force air upwardly throughsaid openings,

and into and through said conduits when the locomotive is runningforward. For the purpose of completing the floor of the lower end of theauxiliary combustion chairibei I provide a horizontal plate 0 which isfbiiled at its rear edge to the forward edge of the depending plate 0 tothe forward water leg of the boiler. This plate extends from side toside of the firebox and closes the lower end of the auxiliar combustionchamber.

In addition to i and at its .forward edge I provide As the gases ofcombustion enter the auxiliary combustion chamber through the contracted)assage a they expand and their speed is r need, and consequently theyare forced to deposit any burden of unburned fuel or cinders which theymay be carrying. These cinders collect in the lower part of theauxiliary combustion chamber, and for the purpose of convenientlyremoving these cinders I provide the middle portion of the floor of theauxiliary combustion chamber with a cinder hopper or outlet D providedwith a cover al which normally closes the lower end of the hopper D andprevents the entrance of air at this point. For the purpose of causinthe accumulating cinder-s to flow into the 0 per, I provide the lowerend of the com ustion chamber with inclined walls d extending from thehopper to the sides of the firebox, preferably filling in the corners ofthe lower part of the auxiliary combustion chamber with refractorIvmaterial to provide these inclined walls.

nstead of extending the wall retaining plate continuously from side toside of the firebox, I sometimes divide it into a series of verticallextending portions 0 by means of vertically extending slots or cracks c.I preferably extend the slots or the divisions between the portions 0from the upper edge of the plate downwardly to the shelf a. Thisformation permits the several sections to accommodate themselves todifferences of temperature without producing undue stralns in the plateas a whole.

In Figs. 4, 5 and 6 I have illustrated a wall support Ewhich isconstructed from a number of vertical sections 6. Each section is asingle integral piece and includes a portion 6 of the shelf upon whichthe wall rests, a portion c forming a part of the wall retaining plate,a portion e forming a part of the depending air directing flange and aportion 6 forming a part of the floor of the auxiliary combustionchamber 1/". I providithese sections on their adjacent edges withflanges c by means of which the srctions can be bolted together to forma continuous wall supporting or bridge member, the end sections of theseries having formed into grallv therewith brackets c by incans of whichthe bridge as a whole is adapted to be secured to the sides of the firebox by means of bolts c". This construction of the bridge memberprovides a bridge, the indt vidual parts of which can be readily handledand placed in position and the individual parts being secured togetherby means of bolts 6 in the flanges e. They are more or less flexible andcan accommodate themselves to changes of dimensions due to changes oftemperature or other causes without producing breaking strains in thebridge member as a whole. The several sections of this form of bridgeplate are adaptetd to be secured to the wall in the manner described inreference to the preferred form of my invention and. each of thesections is provided with a vertically extending brace or rib c, andwith a rib at the rear edge of the shelf portion which serves to retainthe lower row of the bricks of the wall upon the shelf.

In Fig. 7 I have illustrattei'l a modified means of retaining the n allin position against the retaining plate. In this instance I provide theplate with vertically extending T-ribs 0 on its rear face adapted tocooperate with similarly formed grooves b in the bricks, the plate andthe bricks being adapted to be thereby interlocked together and thebricks thereby retained in position against the plate.

As many modifications of my invention will readily suggest themselves toone skilled in the art I do not limit or confine my invention to thespecific structures herein shown and described.

I claim:

1. In a locomotive boiler firebox a vertically arranged cross Wall inthe forwa rd end thereof extending from side to side and ris; ing fromsubstantially the level of the grate, a metallic wall supporting memberextending from side to side, supported by the firebox and retaining thewall in position, said member comprising a horizontal shelf upon whichthe wall rests and an integral vertically extending wall retaining platein contact with the formed face of the wall and substantiallyco-extensive therewith and cap bricks forming the upper edge of the ofthe wall and the upper part of the wall retaining plate and means forretaining the lower part of the wall in position on the shelf.

In a locomotive boiler firebox a retractory cross wall in the forwardend thereof rising from substantially the level of the grate andcomposed of a plurality of horizontal rows of refractory bricks, ametallic bridge member retaining the wall in posh liull, extending fromside to side of the tirebox and supported thereby, said memberronnirising a wall receiving shelf and a \crtically extending wallretaining plat. the shelf and the plate being formed integrally witheach other, said plate being in contact. with the forward face of thewall and substantially (-o-cxicnsive therewith and refractory cap bricksforming the upper edge of the wall and provided with depending forwardends ovt-rla iping the upper edge of the plate, and depending rear endsorerlap nng the upper edge of the wall whereby the wall and plate arebound together and a vertically extending rib or ledge on the rear edgeof the shelf adapted to retain the lower part of the Wall on the shelf,the several rows of bricks being provided with interlocking tongues andgrooves whereby the intermediate rows of bricks are retained inposition.

3. In a locomotive boiler fire box a transverse refractory wall arrangedin the forward end thereof and extending from side to side, a metallicbridge member support in the wall in position and comprising a willshelf and a wall retaining plate integrally formed together, means forsecuring said member to the sides of the fire box, the wall havingvertically extending air conduits adapted to admit air into the fire boxabore the grate. the shelf being provided with openings registering withsaid air conduits and a depending flange or plate on the rear edge ofthe shelf of a size to extend below the lower end of the fire box andadapted to direct air into said openings.

4. In a locomotive boiler fire box a refrae tory cross Wall arranged inthe forward end thereof extending from side to side, a metallic bridgemember retaining said Wall in position and provided with a horizontalshelf and a vertically extending plate formed integrally with the shelfand adapted to contact with the forward face of the wall, means forholding the wall in position -bn said bridge member, a verticallyarranged depending plate at the rear edge of the shelf closing theforward end of the grate space of the fire box and a forwardly inclineddepending plate at the forward edge of the shelf, said depending plates,shelf and vertically extending wall. retaining plate being integrallyformed, means for closing the space between the forward edge of theinclined plate and the forward end of the fire box and a normally closedcinder outlet arranged between the wall and tie flue sheet through whichcinders may be withdrawn from the firebox.

5. In a locomotive boiler fire box a rcfrac tory cross wall arranged inthe forward end thereof extending from side to side and composed of aplurality of bricks arranged in horizontal'rows, a metallic wall supportspanning the firebox and supported thereby, said support comprising ahorizontally extending wall shelf arranged beneath the wall and a buckstay plate formed integrally therewith extending upwardly from the shelfin contact with the forward face of the wall, integral means forretaining the lower rows of bricks upon the shelf and cap bricksinterlocking the upper row of bricks with the upper edge of the plateper-- tion, the intermediate rows of bricks being interlocked with thelower and upper rows and thereby retained n position.

6. In a locomotive boiler fire box a refractory cross wall arranged inthe forward end thereof extending from side to side and composed of aplurality of bricks arranged in horizontal rows, a metallic wall supportspanning the firebox and supported thereby, said support comprising ahorizontally extending wall shelf arranged beneath the Wall and a buckstay plate formed integrally therewith extending upwardly from the shelfin contact with the forward face of the wall, integral means forretaining the lower row of bricks upon the shelf and means for securingthe upper row of bricks to the upper edge of the plate portion, theintermediate rows of bricks being interlocked with the lower and upperrows and thereby retained in position, said wall being provided withvertically extending air conduits adapted to admit air to the tire boxadjacent to the upper edge of the well, said shelf being provided withair in :r opeuin registering with the lower ends of the said conduitsand admitting air thereto and an integral vertically mgr- 1 flange orplate depending from t1 -iielt' to the rear of said openings andadapt-ad to direct air into and through l opcni J .hen fhe locomotive inforward in: ion.

7. In a locomotive hoiier tory cross wall arranged end thereof extendingfr e to side and rising from the grate l My a metallic bridge memberretaining the ii all in position and comprising a shelf upon which thewail rests and a ierti-gsily extending plate substantially coextensivewith the wall and reatl'iing to the upper part thereof and a row of capbricks on'thc upper edge of the wal' having lotiions deprndirn incontact with the forward fare of the p ate and with the rear of the wallwhereby the upper edge of e we x a refracz'no forward i and the upperedge of the e are hound together.

In a. iocmotivc boiler. firebox a refractory cr' s wail arranged in theforward end thereof exten licg from side to side and rising from gratesurface, a metallic bridge member retaining the wall in position andcomprisin r shelf upon which the wall rests and. a vertirally extendingplate substantially (in-extensive with the wall and reaching to theupper part thereof and a row of cap bricks on the upper edge of the wallhaving portions depending in contact with the forward i'aco of the plateand with the rum face of the wall whereby the u per edge of the wall andthe upper edge 0 the plat are bound together wall being provided with aplural ty of verti ally arranged i'ir in ct endi itsi extending from thelower part ihereof and opening through tin rear fair below saidmoi-lapping cap bricks and said shelf be ng provided with regisi ingopenings through which air is admitt d to said conduits.

9 In l-zjcomotive boiler fire box a refractory cross wall arranged in.the forward end thereof extending from side to sideand ri ingsubstantially from the have of (the he, a metallic bridge memberretaining the wall in position and comprising a shelf upon which thewall rests and a veriieall extend-- ing plate substantially(Jo-extensive \"ithmhe wall and reaching to the upper par: tiiereu'f,and a row of cap bricks on the Wall nverlap ping the upper edge of saidplate, and

vain this cap hiicks upon zhe I a and ii the pur ose specified.

" my whereo 1 ha. ve hermmts sa tnf 31131-2), EH3, in i m: Him-asses.

